From the May 2009 issue

Is it possible to combine digitized observations of an object from widely separated telescopes, creating a virtual interferometer?

Robert Keeler, Culver City, California
By | Published: May 26, 2009 | Last updated on May 18, 2023
Keck Observatory
The two large Keck telscopes can combine their light-gathering power through interferometry to probe the universe.

Digital interferometry is possible with low-frequency radio wavelengths, but not with light in the high-frequency optical portion of the spectrum.